Chevrolet Corvair 95 Series Manual page 26

Every 4000 miles thereafter, under normal operating
conditions, drain and refill the crankcase in ·the same
manner. Adverse driving' conditions; such as extreme
dust conditions or short trip winter driving (less than
1,000 miles per month) makes it advisable to change
oil every month. Similar short trip driving in the sum-
mer makes it advisable to change oil every two months.
Use only motor oils certified by their suppliers as hav-
ing met or exceeded the automobile manufacturers se-
quence tests for maximum severity service.
Check the oil level on the dipstick frequently. The
level should be between the "add oil" and "full" mark.
Do not overfill. The oil filter element should be changed
after the first 4,000 miles of driving and every 4,000
miles or every six months whichever occurs first there-
after, · more often under adverse driving conditions.
25
The Corvair engine, being an air cooled engine, is
entirely dependent on the fan belt and blower to supply
sufficient volume of air for cooling purposes. The engine
fan belt should be checked for tightness at regular
intervals and replaced when necessary. Watch the
"Temp ..... Press" and "Gen-Fan" indicator lights on the
instrument panel for signs of possible engine overheating.
The engine air inlet louvers are located in each side
of the car just above the rear wheels. Since these louvers
supply all of the engine combustion and cooling air, care
should be taken that they are
never sealed or blocked.